Cisco Firepower System Software Intelligent Application Bypass Vulnerability

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass configured file action policies if an Intelligent Application Bypass IAB with a drop percentage threshold is also configured. The vulnerability is due to incorrect...

Cisco Industrial Ethernet Switches Device Manager Cross-Site Request Forgery Vulnerability

A vulnerability in the device manager web interface of Cisco Industrial Ethernet Switches could allow an unauthenticated, remote attacker to conduct a cross-site request forgery CSRF attack against a user of an affected system. The vulnerability is due to insufficient CSRF protection by the devic...

Cisco IOS XR Software UDP Broadcast Forwarding Denial of Service Vulnerability

A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service DoS condition on the affected device. The vulnerability is due to improper handling of UDP broadcast packets that are forwarded to an IP...

Cisco AMP for Endpoints macOS Connector DMG File Malware Bypass Vulnerability

A vulnerability in the file type detection mechanism of the Cisco Advanced Malware Protection AMP for Endpoints macOS Connector could allow an unauthenticated, remote attacker to bypass malware detection. The vulnerability occurs because the software relies on only the file extension for detectin...

Cisco WebEx Connect IM Cross-Site Scripting Vulnerability

A vulnerability in Cisco WebEx Connect IM could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of an affected system. The vulnerability is due to insufficient input validation of some parameters that are passed to the web server of the affect...

Cisco Firepower System Software Server Message Block File Policy Bypass Vulnerability

A vulnerability in the detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a configured file action policy that is intended to drop the Server Message Block Version 2 SMB2 and SMB Version 3 SMB3 protocols if malware is detected. The...

Cisco Firepower Threat Defense SSL Engine High CPU Denial of Service Vulnerability

A vulnerability in the Secure Sockets Layer SSL Engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to improper error handling while processing SSL traffic. An attacker could exploit this...

Cisco StarOS IPsec Manager Denial of Service Vulnerability

A vulnerability in the IPsec Manager of Cisco StarOS for Cisco Aggregation Services Router ASR 5000 Series Routers and Virtualized Packet Core VPC System Software could allow an unauthenticated, remote attacker to terminate all active IPsec VPN tunnels and prevent new tunnels from being...

Cisco StarOS Interface Forwarding Denial of Service Vulnerability

A vulnerability in the egress packet processing functionality of the Cisco StarOS operating system for Cisco Aggregation Services Router ASR 5700 Series devices and Virtualized Packet Core VPC System Software could allow an unauthenticated, remote attacker to cause an interface on the device to...

Cisco DNA Center Cross Origin Resource Sharing Vulnerability

A vulnerability in the web framework of the Cisco Digital Network Architecture Center DNA Center could allow an unauthenticated, remote attacker to communicate with the Kong API server without restriction. The vulnerability is due to an overly permissive Cross Origin Resource Sharing CORS policy...

Cisco Wireless LAN Controller Default Simple Network Management Protocol Community Strings

With new installations of Cisco Wireless LAN Controller Software, the installation scripts create default communities for Simple Network Management Protocol SNMP Version 2 SNMPv2 and a default username for SNMP Version 3 SNMPv3, both allowing for read and write access. As documented in the Cisco...

Cisco Firepower Detection Engine Secure Sockets Layer Denial of Service Vulnerability

A vulnerability in the Secure Sockets Layer SSL packet reassembly functionality of the detection engine in Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause the detection engine to consume excessive system memory on an affected device, which could cause a...

Cisco WebEx Clients Remote Code Execution Vulnerability

A vulnerability in Cisco WebEx Business Suite clients, Cisco WebEx Meetings, and Cisco WebEx Meetings Server could allow an authenticated, remote attacker to execute arbitrary code on a targeted system. The vulnerability is due to insufficient input validation by the Cisco WebEx clients. An...

Cisco Identity Services Engine Shell Access Vulnerability

A vulnerability in the support tunnel feature of Cisco Identity Services Engine ISE could allow an authenticated, local attacker to access the device's shell. The vulnerability is due to improper configuration of the support tunnel feature. An attacker could exploit this vulnerability by tricking...

Cisco Adaptive Security Appliance Clientless SSL VPN Cross-Site Scripting Vulnerability

A vulnerability in the Web Server Authentication Required screen of the Clientless Secure Sockets Layer SSL VPN portal of Cisco Adaptive Security Appliance ASA Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of that portal on an...

Cisco Packet Data Network Gateway Peer-to-Peer Message Processing Denial of Service Vulnerability

A vulnerability in the peer-to-peer message processing functionality of Cisco Packet Data Network Gateway could allow an unauthenticated, remote attacker to cause the Session Manager SESSMGR process on an affected device to restart, resulting in a denial of service DoS condition. The vulnerabilit...

Cisco Adaptive Security Appliance Flow Creation Denial of Service Vulnerability

A vulnerability in the ingress flow creation functionality of Cisco Adaptive Security Appliance ASA could allow an unauthenticated, remote attacker to cause the CPU to increase upwards of 100 percent utilization, causing a denial of service DoS condition on an affected system. The vulnerability i...

Cisco Adaptive Security Appliance TLS Denial of Service Vulnerability

A vulnerability in the Transport Layer Security TLS library of Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to trigger a reload of the affected device, resulting in a denial of service DoS condition...

Cisco IOS XE Software Switch Integrated Security Features IPv6 Denial of Service Vulnerability

A vulnerability in the Switch Integrated Security Features of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an interface queue wedge. The vulnerability is due to incorrect handling of crafted IPv6 packets. An attacker could exploit this vulnerability by sending...

Cisco IOS XE Software with Cisco Umbrella Integration Denial of Service Vulnerability

A vulnerability in the Cisco Umbrella Integration feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an...

Cisco IOS XE Software Zone-Based Firewall IP Fragmentation Denial of Service Vulnerability

A vulnerability in the Zone-Based Firewall code of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a device to reload. The vulnerability is due to the way fragmented packets are handled in the firewall code. An attacker could exploit this vulnerability by sending...

Cisco IOS XE Software User EXEC Mode Root Shell Access Vulnerabilities

Multiple vulnerabilities in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to gain access to the underlying Linux shell of an affected device and execute arbitrary commands with root privileges on the device. The vulnerabilities are due to the affected softwa...

Cisco IOS Software Simple Network Management Protocol GET MIB Object ID Denial of Service Vulnerability

A vulnerability in the Simple Network Management Protocol SNMP subsystem of Cisco IOS Software running on certain models of Cisco Catalyst Switches could allow an authenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to a condition that could occur wh...

Cisco IOS and IOS XE Software Forwarding Information Base Denial of Service Vulnerability

A vulnerability in the Forwarding Information Base FIB code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service DoS condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive...

Cisco IOS and IOS XE Software DHCP Version 4 Relay Reply Denial of Service Vulnerability

A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 DHCPv4 packets could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. The...

Cisco IOS and IOS XE Software Internet Key Exchange Version 1 Denial of Service Vulnerability

A vulnerability in the implementation of Internet Key Exchange Version 1 IKEv1 functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. The vulnerability is...

Cisco IOS XE Software Internet Group Management Protocol Memory Leak Vulnerability

A vulnerability in the Internet Group Management Protocol IGMP packet-processing functionality of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust buffers on an affected device, resulting in a denial of service DoS condition. The vulnerability is due to the...

Cisco IOS XE Software for Cisco 4000 Series Integrated Services Routers Privileged EXEC Mode Root Shell Access Vulnerability

A vulnerability in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to gain access to the underlying Linux shell of an affected device and execute arbitrary commands with root privileges on the device. The vulnerability is due to the affected software improperl...

Cisco IOS Software Login Enhancements Login Block Denial of Service Vulnerabilities

Multiple vulnerabilities in the Login Enhancements Login Block feature of Cisco IOS Software could allow an unauthenticated, remote attacker to trigger a reload of an affected system, resulting in a denial of service DoS condition. For more information about these vulnerabilities, see the Details...

Cisco IOS XE Software CLI Command Injection Vulnerabilities

Multiple vulnerabilities in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to inject arbitrary commands into the CLI of the affected software, which could allow the attacker to gain access to the underlying Linux shell of an affected device and execute comman...

Cisco IOS Software 802.1x Multiple-Authentication Port Authentication Bypass Vulnerability

A vulnerability in the 802.1x multiple-authentication multi-auth feature of Cisco IOS Software could allow an unauthenticated, adjacent attacker to bypass the authentication phase on an 802.1x multi-auth port. The vulnerability is due to a logic change error introduced into the code. An attacker...

Cisco IOS XE Software REST API Authorization Bypass Vulnerability

A vulnerability in the Cisco IOS XE Software REST API could allow an authenticated, remote attacker to bypass API authorization checks and use the API to perform privileged actions on an affected device. The vulnerability is due to insufficient authorization checks for requests that are sent to t...

Cisco IOS, IOS XE, and IOS XR Software Link Layer Discovery Protocol Buffer Overflow Vulnerabilities

Multiple vulnerabilities in the Link Layer Discovery Protocol LLDP subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service DoS condition or execute arbitrary code with elevated privileges on a...

Cisco IOS XE Software for Cisco Catalyst Switches IPv4 Denial of Service Vulnerability

A vulnerability in the IP Version 4 IPv4 processing code of Cisco IOS XE Software running on Cisco Catalyst 3850 and Cisco Catalyst 3650 Series Switches could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads ...

Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability

A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service DoS condition. The vulnerability is due to improper validation of packet data. A...

Cisco IOS and IOS XE Software DHCP Version 4 Relay Heap Overflow Denial of Service Vulnerability

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. The vulnerability exists because the affected...

Cisco IOS and IOS XE Software Quality of Service Remote Code Execution Vulnerability

A vulnerability in the quality of service QoS subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition or execute arbitrary code with elevated privileges. The vulnerability is due to incorrect bounds...

Cisco IOS XE Software Arbitrary File Write Vulnerability

A vulnerability in the web-based user interface web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to write arbitrary files to the operating system of an affected device. The vulnerability is due to insufficient input validation of HTTP requests that are sent to the web...

Cisco IOS Software Integrated Services Module for VPN Denial of Service Vulnerability

A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN ISM-VPN running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. The vulnerability is due to insufficient handling of VPN traffi...

Cisco IOS XE Software Web UI Cross-Site Scripting Vulnerabilities

Multiple vulnerabilities in the web-based user interface web UI of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site scripting XSS attack against a user of the web UI of the affected software. The vulnerabilities are due to insufficient input validation...

Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability

Update August 20, 2025: Cisco is aware of continued exploitation activity of the vulnerability that is described in this advisory and strongly recommends that customers assess their systems and upgrade to a fixed software release as soon as possible. A vulnerability in the Smart Install feature o...

Cisco IOS XE Software Static Credential Vulnerability

A vulnerability in Cisco IOS XE Software could allow an unauthenticated, remote attacker to log in to a device running an affected release of Cisco IOS XE Software with the default username and password that are used at initial boot. The vulnerability is due to an undocumented user account with...

Cisco IOS XE Software Privileged EXEC Mode Root Shell Access Vulnerability

A vulnerability in the CLI parser of Cisco IOS XE Software could allow an authenticated, local attacker to gain access to the underlying Linux shell of an affected device and execute arbitrary commands with root privileges on the device. The vulnerability is due to the affected software improperl...

Cisco IOS and IOS XE Software Bidirectional Forwarding Detection Denial of Service Vulnerability

A vulnerability in the Bidirectional Forwarding Detection BFD offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial of service DoS condition. Th...

Cisco IOS XE Software Simple Network Management Protocol Double-Free Denial of Service Vulnerability

A vulnerability in Simple Network Management Protocol SNMP subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service DoS condition. The vulnerability is due to improper management of memory resources, referred to as a double free. An attacker...

Cisco IOS and IOS XE Software DHCP Version 4 Relay Denial of Service Vulnerability

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service DoS condition. The vulnerability exists because the affected...

Cisco IOS XE Software Web UI Remote Access Privilege Escalation Vulnerability

A vulnerability in the web-based user interface web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to gain elevated privileges on an affected device. The vulnerability exists because the affected software does not reset the privilege level for each web UI session. An...

Cisco IOS and IOS XE Software Internet Key Exchange Memory Leak Vulnerability

A vulnerability in the Internet Key Exchange Version 2 IKEv2 module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service DoS condition. The vulnerability is due to...

Cisco Umbrella Dashboard Session Expiration Issue

Cisco Umbrella uses the internet infrastructure to block connections to malicious destinations before any connections to those destinations can be established. Cisco Umbrella also provides visibility into internet activity across all devices and all ports, even when users are no longer connected ...

Cisco Identity Services Engine Command Injection to Underlying Operating System Vulnerability

A vulnerability in specific CLI commands for the Cisco Identity Services Engine ISE could allow an authenticated, local attacker to perform command injection to the underlying operating system or cause a hang or disconnect of the user session. The attacker needs valid administrator credentials fo...